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阶梯型加速段对旋流喷嘴雾化特性的影响

刘赵淼 王凯峰 王治林 郑会龙 张谭 康振亚

刘赵淼, 王凯峰, 王治林, 郑会龙, 张谭, 康振亚. 阶梯型加速段对旋流喷嘴雾化特性的影响[J]. 力学学报, 2018, 50(3): 570-578. doi: 10.6052/0459-1879-18-006
引用本文: 刘赵淼, 王凯峰, 王治林, 郑会龙, 张谭, 康振亚. 阶梯型加速段对旋流喷嘴雾化特性的影响[J]. 力学学报, 2018, 50(3): 570-578. doi: 10.6052/0459-1879-18-006
Liu Zhaomiao, Wang Kaifeng, Wang Zhilin, Zheng Huilong, Zhang Tan, Kang Zhenya. INFLUENCE OF LADDER TYPE ACCELERATING SECTION ON ATOMIZATION CHARACTERISTICS OF PRESSURE SWIRL ATOMIZER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(3): 570-578. doi: 10.6052/0459-1879-18-006
Citation: Liu Zhaomiao, Wang Kaifeng, Wang Zhilin, Zheng Huilong, Zhang Tan, Kang Zhenya. INFLUENCE OF LADDER TYPE ACCELERATING SECTION ON ATOMIZATION CHARACTERISTICS OF PRESSURE SWIRL ATOMIZER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(3): 570-578. doi: 10.6052/0459-1879-18-006

阶梯型加速段对旋流喷嘴雾化特性的影响

doi: 10.6052/0459-1879-18-006
基金项目: 航空科学基金资助项目(20140375002, 20150375001).
详细信息
    作者简介:

    通讯作者:刘赵淼, 教授, 主要研究方向: 微流体力学、流固耦合分析及其工程应用.E-mail: lzm@bjut.edu.cn

    通讯作者:

    刘赵淼

INFLUENCE OF LADDER TYPE ACCELERATING SECTION ON ATOMIZATION CHARACTERISTICS OF PRESSURE SWIRL ATOMIZER

  • 摘要: 旋流内芯是压力旋流式喷嘴最主要的旋流发生构件, 其几何特征直接影响压力旋流式喷嘴的喷雾特性.目前采用平滑型加速段的旋流内芯导流效率较低.为减小高流量条件下的能量损失, 使喷嘴旋流内芯加速段对喷雾介质产生预旋效应, 增强旋流强度, 本文设计喷嘴旋流内芯加速段为阶梯型, 其下段阶梯相对上段阶梯旋转15°, 旋向与喷嘴旋流槽方向相同.利用粒子动态分析仪(particle dynamics analysis system, PDA) 和高速摄影(charge coupled device, CCD)系统实验研究了加速段结构改进前后喷嘴的喷雾流量、雾场索特尔平均直径(Sauter mean diameter, SMD)、雾滴速度以及喷雾锥角, 并分析了SMD、 雾滴速度的轴向和径向分布特性. 结果表明, 背压差0.08~ 0.46 MPa 范围内, 阶梯型加速段对喷雾介质具有较好的预旋效果.喷嘴的流量提高了48.0% ~ 51.8%; 喷雾的轴向速度提升了31.4% ~ 32.8%, 径向速度提升了1.6% ~ 16.8%; 喷雾锥角减小了4.21°~6.57°; 较高背压差下喷雾下游的SMD减小了9.8%.与平滑型加速段相比, 阶梯型加速段的设计有效地提高了喷嘴的雾化质量.

     

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  • 收稿日期:  2018-01-03
  • 刊出日期:  2018-05-18

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